Dayton underwent a third procedure to fuse several vertebrae in his lower back Friday morning. The operation was meant to improve the 71-year-old governor's leg strength and stability.

Spokesman Matt Swanson said Dayton was conscious and resting after a successful surgery at Mayo Clinic on Friday afternoon. The governor will remain in the hospital for several days of recovery.

Dayton has been hampered by health problems throughout his two terms in office. He's had three back surgeries, a procedure to repair a torn hip muscle and was treated for prostate cancer last year. Dayton revealed his diagnosis one day after collapsing during his State of the State address.